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Investments (Narrative) (Details) R$ in Thousands, $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 60 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 16, 2017 USD ($) | May 15, 2017 | May 15, 2017 | Dec. 31, 2011 | Dec. 31, 2018 BRL (R$) | Apr. 30, 2017 | Dec. 31, 2018 USD ($) | Mar. 31, 2017 | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2016 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 BRL (R$) | Dec. 31, 2017 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from equity method investments |  |  |  |  |  |  |  |  | $ 2,038 | $ 1,636 | $ 1,233 |  |  |  |  |  |  |  |
MSIL |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  | 49.00% |  |  |  |  |  | 49.00% |  |  |  |  | 49.00% | 49.00% | 49.00% | 49.00%
Equity method investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,288 |  | $ 10,131
Income (loss) from equity method investments |  |  |  |  |  |  |  |  | 2,038 | 1,636 | $ 1,233 |  |  |  |  |  |  |  |
PST Eletronica Ltda [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage ownership in consolidated subsidiary |  | 74.00% | 74.00% | 74.00% |  | 74.00% |  | 74.00% |  |  | 74.00% | 74.00% | 74.00% | 74.00% | 74.00% | 74.00% |  |  |
Percentage of additional noncontrolling interest acquired | 26.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest | $ 14,458 |  |  |  |  |  |  |  |  |  | $ 13,762 | $ 13,310 |  |  |  | $ 13,762 |  |  | 0
Dividends payable |  |  |  |  | R$ 23,204 |  |  |  |  |  |  |  |  |  |  |  | 5,980 | R$ 22,330 | 6,742
Payments to Noncontrolling Interests | 1,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of earn-out liability | 10,180 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable, Price Index Adjustment |  |  |  |  | R$ 2,752 |  |  |  |  |  |  |  |  |  |  |  | 709 | R$ 1,879 | $ 567
PST Eletronica Ltda [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expense related to fair value adjustment for earn-out consideration |  |  |  |  |  |  |  |  | $ (156) | $ 2,632 |  |  |  |  |  |  |  |  |
PST Eletronica Ltda [Member] | Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest | 16,995 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PST Eletronica Ltda [Member] | Additional Paid-In Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest | $ 31,453 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Autotech Ventures [Member] | Venture Capital Funds [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000 |  |
Contribution expected period (in years) |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contribution |  |  |  |  |  |  | $ 437 |  |  |  |  |  |  |  |  |  |  |  |

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